Wow. I remember going through his bucket one day and saw all those cards and assumed they were just some normal cards to him. I would be beyond ticked. I guess the one thing to help you would be some of them being very unique cards or serial numbered so they may turn up. Id be checking ebay to see if any pop up each day.
Current Filling BO GB's-5 Case Panini Optic Basketball Player/Slot Draft(135 Spots) and 5 Case 2015 Bowman Player/Slot Draft